Question

Refer to the given oxidation-reduction reaction, which takes place in acidic solution:
MnO₄⁻(aq) + Br⁻(aq) → MnO₂(s) + BrO₃⁻(aq)
The number of electrons transferred in the reaction is:

Answer 1

You need to balance by the half-reaction method to see

Answer 2

Mn is going from a +7 to a +4 and Br is going from a -1 to a +5

Answer 3

Thank you both!